The WAGO 750-643 is a specialised MP-Bus master communication module designed for integration within the WAGO I/O System 750. It enables PLC and controller systems to connect directly to MP-Bus devices such as HVAC actuators and sensors used in building automation and environmental control systems.
The module acts as the master for the Belimo MP-Bus (Multi-Point Bus), allowing MP-Bus networks to be integrated into higher-level automation systems such as Ethernet-based or fieldbus control platforms. This allows centralised monitoring and control of HVAC components including dampers, valve actuators and variable air volume (VAV) systems. :contentReference
A single MP-Bus line can connect multiple actuators and sensors, significantly reducing wiring complexity while maintaining reliable communication between field devices and the control system.
Key Advantages
Integrated MP-Bus master interface for HVAC automation.
Connects Belimo MP-Bus actuators and sensors directly to PLC systems.
Supports up to 8 MP-Bus slave devices on one bus line.
Allows connection of one sensor per actuator.
Reduces wiring complexity in building automation installations.
Compact DIN rail module for WAGO I/O System 750.
Key Features
MP-Bus master communication module.
Supports Belimo MP-Bus protocol.
Controls and monitors up to 8 MP-Bus slaves.
Supports actuator sensors such as temperature, humidity and switching signals.
Provides connection to higher-level control systems via the WAGO fieldbus controller.
Parameterisation possible using Belimo handheld or PC configuration tools.
Compact DIN rail installation with CAGE CLAMP® spring terminals.
MP-Bus Communication in Building Automation
The MP-Bus protocol is widely used in HVAC and building automation systems to connect actuators, sensors and controllers on a single communication line. Using a master-slave architecture, devices such as damper actuators, valve regulators and ventilation controllers can communicate with a central control system.
The WAGO 750-643 module enables these MP-Bus devices to be integrated directly into distributed PLC architectures, allowing building automation systems to be managed alongside industrial control processes within a single control platform. :contentReference
Typical Applications
HVAC control systems in commercial buildings.
Integration of Belimo MP-Bus actuators.
Variable air volume (VAV) control systems.
Automated ventilation and damper control.
Building energy management and environmental monitoring.
Technical Specifications
Voltage
24 V
IP Rating
IP20
Series
I/O System 750
Module type
MP-Bus master communication module
Bus protocol
Belimo MP-Bus (PP/MP specification)
Maximum slaves
8 MP-Bus devices
Sensor support
1 sensor per actuator
MP-Bus supply voltage
24 V DC
System supply voltage
5 V DC via internal system bus
Current consumption
approx. 25 mA (MP-Bus)
Isolation
approx. 500 V between MP-Bus and system bus
Connection technology
WAGO CAGE CLAMP®
Mounting
DIN-35 rail
Protection rating
IP20
Operating temperature
0 to 55 °C
Module width
approx. 12 mm
HS Code
85389099
Country of Manufacture
Germany
Frequently Asked Questions
What is the WAGO 750-643 used for?
The module acts as an MP-Bus master that connects Belimo actuators and sensors to a WAGO PLC or automation system.
How many MP-Bus devices can be connected?
The module can manage up to 8 MP-Bus slave devices on a single bus network.
What types of devices connect to the MP-Bus?
Typical devices include damper actuators, valve actuators and VAV controllers used in HVAC systems.
Does the module support sensors?
Yes. Each actuator connected via MP-Bus can also provide access to a connected sensor such as temperature or humidity.
Which systems support this module?
The module integrates with WAGO I/O System 750 fieldbus couplers and programmable controllers.
Trusted by Building Automation Engineers
WAGO I/O System 750 modules are widely used in industrial and building automation projects to integrate HVAC devices, sensors and control systems within scalable PLC architectures.
Voltage
24 V
IP Rating
IP20
Series
I/O System 750
Module type
MP-Bus master communication module
Bus protocol
Belimo MP-Bus (PP/MP specification)
Maximum slaves
8 MP-Bus devices
Sensor support
1 sensor per actuator
MP-Bus supply voltage
24 V DC
System supply voltage
5 V DC via internal system bus
Current consumption
approx. 25 mA (MP-Bus)
Isolation
approx. 500 V between MP-Bus and system bus
Connection technology
WAGO CAGE CLAMP®
Mounting
DIN-35 rail
Protection rating
IP20
Operating temperature
0 to 55 °C
Module width
approx. 12 mm
HS Code
85389099
Country of Manufacture
Germany
No documents available for this product.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...